The authority conferred by the preceding section shall be in addition to, and not in lieu of, authority to prosecute criminally any person unlawfully engaged in practice. The granting and enforcing of an injunction or quo warranto to prevent unlawful practice is a preventive measure, not a punitive measure, and the fact that a person has been charged with or convicted of criminally having so practiced shall not prevent the issuance of a writ of injunction or quo warranto to prevent such person’s further practice; nor shall the fact that a writ of injunction or quo warranto has been granted to prevent further practice preclude the institution of criminal prosecution and punishment.